When capship pilots dock with their own capital ship, the engine type for the ship they are currently flying is being unloaded into the capital ship. The pilot must take control of the capship for this to happen. For example, if a pilot is flying a xc, and they take control of the goli/dent, a xc engine shows up the capship's hold.

Yep happening to me too, for my goliath only though not my trident.

Also, when attempting to unload these engines in a station I get "station error 24: That addon can't go there.", but they are able to be jettisoned and picked up as cargo crates.

Nevermind it started happening with my dent too

Not being able to unload them to stations is normal, everything else though not so much.

We'll take a look, but it may be Saturday before we can fix it.

This should now be fixed.